MAKGANESE chlorosis of pineapple. 
33 
picture was taken. Spraying with iron, however, will induce a growth 
of green suckers from even such extreme cases as these. 
Plate IV shows characteristic fruit from the sprayed and the un- 
sprayed rows. In this and the various field views the broad cylin- 
drical development and filling out of the •'shoulder" of the fruit 
underneath the crown as the result of the spraying from above 
should be noted. This cylindrical development of the fruit is veiy 
much desired by the pineapple canneries because it caused the least 
waste in sizing for the cans. As a result of this broadening and 
filling out nearly all of the fruit from the sprayed rows was classed as 
"first," or Xo. I, 6 while most of the elongated fruit from the un- 
sprayed rows, even in the heavier weights, had to be classed as 
"seconds." or No. 2, the value of which per ton is reckoned as about 
three-fifths that of Xo. 1 fruit. 
DISCUSSION OF RESULTS. 
During June, July. August, and September trips were made once 
a week or oftener to harvest the fruit as it ripened. After the crown 
and stem were removed the ripe pineapple fruit was weighed accu- 
rately to ounces, and its diameter was carefully measured. The 
weight of each fruit and its diameter were entered on a large chart 
according to the position of the bearing plant in the row. Where no 
fruit was produced the condition of the plant was noted in the chart. 
Each fruit was classified according to its diameter as Xo. 1 or Xo. 2. 
Where a few fruits had been removed from the sprayed rows before 
harvesting, the plants were credited with the average of the nearest 
fruits. A short summary of the yields on the sprayed and unsprayed 
rows is given in Table 16. 
Table 16. — Results of spraying pineapple plants on highly manganiferous soils with 
iron sulphate solutions. 
Unsprayed 
rows. 
Rows re- 
ceiving 
single 
spraying. 
Rows re- 
ceiving full 
iron spray 
treatment 
in April. 
Plants from which fruit was harvested _. . . 
Xumber. 
108 
Xumber. 
151 
5 
1 
Xumber. 
244 
Plants hearing fruit too young to harvest 
9 
Plants blossoming 
Plants starting to blossom . 
3 
11 
36 
Plants dead . _ 
31 
101 
57 
Plants with fruit cracked open and decaved 
81 
62 
..... 
Verv vellow plants giving no evidence of blossoms 
Total 
300 
300 
300 
pounds.. 
do.... 
Total weight of harvested fruit 
Average weight of fruits. ... __ . .. 
3101 
2| 
10.H 
39 
69 
36.1 
431-rf 
.'" 
151 
75 
76 
49.6 
7741 
3f5 
Fruits harvested... ... .. 
244 
Fruits classed as "first" or Xo. 1 
Fruits classed as "second" or Xo. 2 
214 
30 
Fruits classed as Xo. 1 
per cent.. 
pounds.. 
_...:. .do.... 
87.7 
Weight of Xo. 1 fruit.. 
Weight of Xo. 2 fruit 
128H 
181-rV 
250A 
181* 
70OrV 
74-rV 
do.... 
Total weight of fruit 
310| 
43 Iff 
774f 
6 Cannery classification by diameter, fruits having a diameter above 4f inches being classed as Xo. 1, 
and those having a diameter of 4i to 4f inches as Xo. 2. 
° These results are for adjoining double 300-foot rows, in each of which there were 150 plants. 
